Preparation of Thermoplastic Polyurethane/Oleic Acid Modified Mn2O3@Mn5O8 Composite Fiber Membrane and Its Fenton Degradation on Semi-Coking Wastewater

The treatment of semi-coking wastewater generated during the semicoke production process has long been a bottleneck restricting the development of the coal chemical industry. The Fenton reaction is recognized as one of the most effective strategies for addressing water pollution; however, the susceptibility to mineralization and poor reusability of highly active catalysts has limited their practical application. Herein, a thermoplastic polyurethane (TPU) doped with oleic acid modified Mn 2 O 3 @Mn 5 O 8 (Mn 2 O 3 @Mn 5 O 8 -OA) composite fiber membrane was prepared via melt-blown spinning and blending using a melt-blown pilot setup. This composite was employed to activate peroxymonosulfate (PMS) for the degradation of semi-coking wastewater, achieving a maximum chemical oxygen demand (COD) removal efficiency of 72.4%. Material characterization confirmed successful catalyst immobilization and enhanced surface properties. Theoretical calculations provided molecular-level insights into the adsorption behavior of phenol and its degradation intermediates. The TPU-based membrane significantly improved catalyst stability and reusability while maintaining high catalytic activity, offering an effective strategy for advanced oxidation processes in complex wastewater treatment.